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  <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a></div> <!----></nav>  <ul class="sidebar-links"><li><div class="sidebar-group first"><p class="sidebar-heading open"><span>gcc官方文档『概念梳理』</span> <!----></p> <ul class="sidebar-group-items"><li><a href="/05.Engineer/compilation/%E2%80%94%E2%80%94GCC7.3.0.%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3.html#⭐️前置说明" class="sidebar-link">⭐️前置说明</a><ul class="sidebar-sub-headers"></ul></li><li><a href="/05.Engineer/compilation/%E2%80%94%E2%80%94GCC7.3.0.%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3.html#⭐️图标说明" class="sidebar-link">⭐️图标说明</a><ul class="sidebar-sub-headers"></ul></li><li><a href="/05.Engineer/compilation/%E2%80%94%E2%80%94GCC7.3.0.%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3.html#🎓7-testsuites测试套件" class="sidebar-link">🎓7.Testsuites测试套件</a><ul class="sidebar-sub-headers"></ul></li><li><a href="/05.Engineer/compilation/%E2%80%94%E2%80%94GCC7.3.0.%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3.html#_8-选项详述文件『option-specification-files-』" class="sidebar-link">8.选项详述文件『Option specification files 』</a><ul class="sidebar-sub-headers"></ul></li><li><a href="/05.Engineer/compilation/%E2%80%94%E2%80%94GCC7.3.0.%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3.html#⭐️9-passes和xx的编译器『passes-and-files-of-the-compiler" class="sidebar-link">⭐️9.passes和XX的编译器『Passes and Files of the Compiler</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a href="/05.Engineer/compilation/%E2%80%94%E2%80%94GCC7.3.0.%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3.html#_9-1-parsing『语法分析』-pass" class="sidebar-link">9.1 Parsing『语法分析』 ==pass==</a></li><li class="sidebar-sub-header"><a href="/05.Engineer/compilation/%E2%80%94%E2%80%94GCC7.3.0.%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3.html#_9-2-cilk-plus-transformation『转型』" class="sidebar-link">9.2 Cilk Plus Transformation『转型』</a></li></ul></li><li><a href="/05.Engineer/compilation/%E2%80%94%E2%80%94GCC7.3.0.%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3.html#🎓13-rtl-representation（描述-）" class="sidebar-link">🎓13 RTL Representation（描述/）</a><ul class="sidebar-sub-headers"></ul></li><li><a href="/05.Engineer/compilation/%E2%80%94%E2%80%94GCC7.3.0.%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3.html#⭐️14-控制流图『control-flow-graph』" class="sidebar-link">⭐️14.控制流图『Control Flow Graph』</a><ul class="sidebar-sub-headers"></ul></li><li><a href="/05.Engineer/compilation/%E2%80%94%E2%80%94GCC7.3.0.%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3.html#_17-target-description-macros-and-functions『目标（机器）描述-宏和函数』" class="sidebar-link">17.==Target== Description Macros and Functions『目标（机器）描述  宏和函数』</a><ul class="sidebar-sub-headers"></ul></li><li><a href="/05.Engineer/compilation/%E2%80%94%E2%80%94GCC7.3.0.%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3.html#_18-host-configuration『配置』" class="sidebar-link">18.==Host== Configuration『配置』</a><ul class="sidebar-sub-headers"></ul></li><li><a href="/05.Engineer/compilation/%E2%80%94%E2%80%94GCC7.3.0.%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3.html#_19-makefile-fragments『makefile-片段』" class="sidebar-link">19.Makefile Fragments『Makefile 片段』</a><ul class="sidebar-sub-headers"></ul></li><li><a href="/05.Engineer/compilation/%E2%80%94%E2%80%94GCC7.3.0.%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3.html#_20-collect2🚀" class="sidebar-link">20.collect2🚀</a><ul class="sidebar-sub-headers"></ul></li><li><a href="/05.Engineer/compilation/%E2%80%94%E2%80%94GCC7.3.0.%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3.html#_21-标准头文件目录『standard-header-file-directories』" class="sidebar-link">21.标准头文件目录『Standard Header File Directories』</a><ul class="sidebar-sub-headers"></ul></li><li><a href="/05.Engineer/compilation/%E2%80%94%E2%80%94GCC7.3.0.%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3.html#🎓24-link-time-optimization『链接时间优化』" class="sidebar-link">🎓24.Link Time Optimization『链接时间优化』</a><ul class="sidebar-sub-headers"></ul></li><li><a href="/05.Engineer/compilation/%E2%80%94%E2%80%94GCC7.3.0.%E5%AE%98%E6%96%B9%E6%96%87%E6%A1%A3.html#🎓25-匹配和简化『match-and-simplify』" class="sidebar-link">🎓25.匹配和简化『Match and Simplify』</a><ul class="sidebar-sub-headers"></ul></li></ul></div></li></ul> </div> <div class="page"> <div class="content"><h1 id="gcc官方文档『概念梳理』"><a href="#gcc官方文档『概念梳理』" class="header-anchor">#</a> gcc官方文档『概念梳理』</h1> <div class="language-txt line-numbers-mode"><pre class="language-text"><code>&lt;font style=&quot;background:yellow&quot;&gt;
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><h2 id="⭐️前置说明"><a href="#⭐️前置说明" class="header-anchor">#</a> ⭐️前置说明</h2> <ul><li>目录来源：<font style="background:yellow;">gcc int-7.3.0</font></li> <li>参照翻译：gcc int-4.4.5</li> <li>《深入分析gcc》：gcc int-4.4.0</li> <li>论文算法实现版本：gcc int-4.1.0</li> <li>目前，我看的源代码版本：<font style="background:yellow;">gcc int-4.1.0</font></li></ul> <h2 id="⭐️图标说明"><a href="#⭐️图标说明" class="header-anchor">#</a> ⭐️图标说明</h2> <ul><li>🎓表示该章节在『gcc int-4.4.5』中没有，是新增的章节</li> <li>🚀表示简短的一章，可快速看完。</li> <li>✅已完成</li> <li>⭐️重点查看『章节+概念』</li></ul> <h2 id="🎓7-testsuites测试套件"><a href="#🎓7-testsuites测试套件" class="header-anchor">#</a> 🎓7.Testsuites测试套件</h2> <ul><li>suite，n.一套</li> <li>suites，n.组曲；套房；餐厅套件</li></ul> <h2 id="_8-选项详述文件『option-specification-files-』"><a href="#_8-选项详述文件『option-specification-files-』" class="header-anchor">#</a> 8.选项详述文件『Option specification files 』</h2> <ul><li>specification，n.详述；规范；规格</li></ul> <h2 id="⭐️9-passes和xx的编译器『passes-and-files-of-the-compiler"><a href="#⭐️9-passes和xx的编译器『passes-and-files-of-the-compiler" class="header-anchor">#</a> ⭐️9.passes和XX的编译器『Passes and Files of the Compiler</h2> <ul><li>本章专门概述编译器的优化和代码生成过程。 在这个过程中，它描述了一些语言前端界面『the language front end interface』，尽管这个描述还远未完成。</li></ul> <h3 id="_9-1-parsing『语法分析』-pass"><a href="#_9-1-parsing『语法分析』-pass" class="header-anchor">#</a> 9.1 Parsing『语法分析』 ==pass==</h3> <ul><li><p>《深入分析GCC》说：</p> <ul><li>GCC</li></ul></li> <li><p>语言前端仅通过 lang_hooks.parse_file 调用一次，以解析整个输入。 语言前端可以使用任何认为合适的中间语言表示。 C 前端使用 GENERIC 树（请参阅第 10 章 [GENERIC]，第 135 页），以及在“c-common.def”中定义的双份特定于语言的树代码。</p></li> <li><p>Fortran 前端使用完全不同的私有表示。</p></li></ul> <h3 id="_9-2-cilk-plus-transformation『转型』"><a href="#_9-2-cilk-plus-transformation『转型』" class="header-anchor">#</a> 9.2 Cilk Plus Transformation『转型』</h3> <h2 id="🎓13-rtl-representation（描述-）"><a href="#🎓13-rtl-representation（描述-）" class="header-anchor">#</a> 🎓13 RTL Representation（描述/）</h2> <ul><li>Representation，n.代表；有人代表的状况；==描述==；描写；陈述；述说；抗议；说明；声明；<strong>声称</strong></li></ul> <h2 id="⭐️14-控制流图『control-flow-graph』"><a href="#⭐️14-控制流图『control-flow-graph』" class="header-anchor">#</a> ⭐️14.控制流图『Control Flow Graph』</h2> <p>A <strong>control flow graph (CFG)</strong> is a data structure built on top of the intermediate code representation『中间代码表示』 (the ==RTL== or ==GIMPLE== instruction stream) abstracting the control flow behavior of a function that is being compiled.</p> <p>控制流图 (CFG) 是一种建立在中间代码表示（RTL 或 GIMPLE 指令流）之上的数据结构，它抽象了正在编译的函数的控制流行为。</p> <p>CFG 是一个有向图，其中顶点表示基本块，边表示控制流从一个基本块到另一个基本块的可能转移。 用于表示控制流图的数据结构在==<code>basic-block.h</code>==中定义。</p> <p>14.1.基本块『Basic Blocks』</p> <ul><li>whoway：==论文中经常出现==</li> <li><strong>基本块</strong>是只有一个入口点和一个出口的『straight-line』直线（性）代码序列
<ul><li>在 GCC 中，基本块使用==<code>basic_block</code>==数据类型表示</li></ul></li></ul> <div class="language-txt line-numbers-mode"><pre class="language-text"><code>basic_block bb;

FOR_EACH_BB (bb)
{
    gphi_iterator pi;
    gimple_stmt_iterator si;

    for (pi = gsi_start_phis (bb); !gsi_end_p (pi); gsi_next (&amp;pi))
    {
        gphi *phi = pi.phi ();
        print_gimple_stmt (dump_file, phi, 0, TDF_SLIM);
    }

    for (si = gsi_start_bb (bb); !gsi_end_p (si); gsi_next (&amp;si))
    {
        gimple stmt = gsi_stmt (si);
        print_gimple_stmt (dump_file, stmt, 0, TDF_SLIM);
    }
}
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br></div></div><p>14.2.边『Edges』</p> <ul><li>边表示从某个<strong>基本块 A 的末尾</strong>到另一个<strong>基本块 B 的头</strong>的可能的控制流传输『control flow transfers』</li></ul> <h2 id="_17-target-description-macros-and-functions『目标（机器）描述-宏和函数』"><a href="#_17-target-description-macros-and-functions『目标（机器）描述-宏和函数』" class="header-anchor">#</a> 17.==Target== Description Macros and Functions『目标（机器）描述  宏和函数』</h2> <h2 id="_18-host-configuration『配置』"><a href="#_18-host-configuration『配置』" class="header-anchor">#</a> 18.==Host== Configuration『配置』</h2> <blockquote><p>注意：这里的Host指的是：编译器实际运行的机器</p></blockquote> <ul><li>大多数关于编译器实际运行的机器和系统的详细信息可以由 configure 脚本检测</li> <li>有一些是不可能 通过 configure 来检测到的</li></ul> <h2 id="_19-makefile-fragments『makefile-片段』"><a href="#_19-makefile-fragments『makefile-片段』" class="header-anchor">#</a> 19.Makefile Fragments『Makefile 片段』</h2> <h2 id="_20-collect2🚀"><a href="#_20-collect2🚀" class="header-anchor">#</a> 20.collect2🚀</h2> <blockquote><p>collect2是个工具！</p></blockquote> <ul><li>GCC使用叫做 collect2 的工具，在<strong>几乎所有</strong>的系统上，来安排在<strong>起始</strong>时候调用不同的初始化函数</li></ul> <h2 id="_21-标准头文件目录『standard-header-file-directories』"><a href="#_21-标准头文件目录『standard-header-file-directories』" class="header-anchor">#</a> 21.标准头文件目录『Standard Header File Directories』</h2> <h2 id="🎓24-link-time-optimization『链接时间优化』"><a href="#🎓24-link-time-optimization『链接时间优化』" class="header-anchor">#</a> 🎓24.Link Time Optimization『链接时间优化』</h2> <h2 id="🎓25-匹配和简化『match-and-simplify』"><a href="#🎓25-匹配和简化『match-and-simplify』" class="header-anchor">#</a> 🎓25.匹配和简化『Match and Simplify』</h2></div> <div class="page-edit"><!----> <!----></div> <!----> </div> <!----></div></div>
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